Change in coreboot[master]: soc/intel/common: add generic gpio lock mechanism

[Nick Vaccaro (Code Review)]

Attention is currently required from: Bora Guvendik, Furquan Shaikh, Selma Bensaid, Maulik V Vaghela, Tim Wawrzynczak, Subrata Banik, Patrick Rudolph, Karthik Ramasubramanian.
Nick Vaccaro has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58351 )

Change subject: soc/intel/common: add generic gpio lock mechanism
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Patch Set 7:

(3 comments)

File src/soc/intel/common/block/gpio/gpio.c:

https://review.coreboot.org/c/coreboot/+/58351/comment/6ed0cb75_4db4d84f 
PS6, Line 457: cur_list_num
> suggestion: you can move this variable declaration to the `for` loop directly. […]

Done

https://review.coreboot.org/c/coreboot/+/58351/comment/7379c4f1_6909cd56 
PS6, Line 533: if (status || response) {
             : 					printk(BIOS_ERR, "%s: error status=%x response=%x\n",
             : 							__func__, status, response);
             : 					err_response = (status == -1) ? -1 : response;
             : 					continue;
             : 				}
> suggestion: to create a helper function to manage the error case ? […]

Done

https://review.coreboot.org/c/coreboot/+/58351/comment/3ef44507_c0f87dc3 
PS6, Line 545: = msg.offset +
> nit: += 4 ?

Done